CA2322334A1 - Waveguide for microwave manipulation - Google Patents
Waveguide for microwave manipulation Download PDFInfo
- Publication number
- CA2322334A1 CA2322334A1 CA002322334A CA2322334A CA2322334A1 CA 2322334 A1 CA2322334 A1 CA 2322334A1 CA 002322334 A CA002322334 A CA 002322334A CA 2322334 A CA2322334 A CA 2322334A CA 2322334 A1 CA2322334 A1 CA 2322334A1
- Authority
- CA
- Canada
- Prior art keywords
- waveguide
- channel
- figures
- performance characteristics
- microwave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
Landscapes
- Waveguides (AREA)
Abstract
This invention relates to a microwave waveguide which utilizes geometric shapes to cause the creation of associated fields whereby the combination of associated and primary fields result in an output meeting particular (pre-specified) performance requirements.
Description
WAVEGUIDE FOR MICROWAVE MANIPULATION
Field of the Invention This invention relates to the design of microwave waveguides and, in s particular, to a waveguide incorporating geometrically-shaped elements and utilizing the associated primary (near) fields generated thereby to manipulate input microwave signals to satisfy specified performance requirements.
Background of the Invention Present waveguide design techniques rely on the fields generated by 1 o physical attributes such as complex internal contours and slot arrays but these physical attributes are difficult to control by reason of detrimental effects associated with manufacturing tolerances, operational variations, environmental changes and the target performance requirements. As a result, the present devices have associated with them undesirable performance losses and costs.
15 Summar)i of the Invention In accordance with the invention there is provided a waveguide configured for satisfying predetermined performance characteristics. A channel is provided by the waveguide and at least one geometrically-shaped element is positioned 2 o within the channel, the dimensions of the channel relative to the element determining the performance characteristics of the waveguide.
Brief Description of the Drawings Reference will now be made to the accompanying drawings which illustrate the present invention and in which like reference numerals refer to like 25 elements throughout.
Figures 1 (a) and 1 (b) illustrate a prior art waveguide, Figure 1 (a) being a perspective view thereof and Figure 1 (b) being a side cross-sectional view of the prior art waveguide of Figure 1 (a);
Figures 2(a) and 2(b) illustrate an exemplary waveguide in accordance with the present invention, Figure 2(a) being a perspective view thereof and Figure 2(b) being a side cross-sectional view of the waveguide of Figure 2(a);
Figures 3(a) - (e) illustrates another exemplary waveguide in accordance s with the present invention, Figure 3(a) showing a side cross-sectional view of the waveguide and Figures 3(b), (c), (d) and (e) showing front cross-sectional views taken at sections A-A, B-B, C-C and D-D, respectively; and, Figures 4(a) and 4(b) illustrates another exemplary waveguide in accordance with the present invention, Figure 4(a) being a fragmented io perspective view thereof (showing separated top and bottom halves one over the other) and Figure 4(b) being a side cross-sectional view of the waveguide of Figure 4(a) (but with the top and bottom halves joined together).
Detailed Description of the Illustrated Preferred Embodiment Figures 1 (a) and 1 (b) of the drawings show a conventional (prior art) 15 microwave waveguide in which the near (primary) field is determined according to a calculation based on the channel height n and length L of the waveguide.
For this conventional waveguide the nearfield extends overthe full length of the parallel sides 12 and 14 and this produces undesirable loss.
Figures 2(a) and 2(b) show a relatively simple waveguide in accordance 2 o with this invention in which a simple geometric bar-shape element 20 of uniform height h is incorporated into the waveguide channel at space intervals along the top and bottom sides of the waveguide channel and the field response is determined as a result of the primary field associated with the distance between two adjacent elements 20. A sufficient primary field must be produced 2 s in order to support the required, pre-determined microwave manipulation.
For this embodiment the primary field calculation is determined on the basis of the uninterrupted channel height n and the length L of the waveguide and the associated (secondary) field calculation is determined on the basis of the greatest (interrupted) channel height f, the length d of the bar element (geometric shape) 20 and the distance g between adjacent bar elements (geometric shapes) 20.
Figures 3(a)-(e) show a more complex waveguide in accordance with this invention in which a bar-shape element 40 is incorporated into the waveguide s channel at space intervals along the top and bottom sides of the waveguide channel and the height h of one set of these (being the upper elements in these figures) is varying across its width. This varies the near field and field response is determined as a result of an averaging of the primary field and associated fields whereby there is no longer any need that these elements be located 1 o precisely within the waveguide.
Figures 4(a) and 4(b) show a more complex waveguide in accordance with the invention in which a pin-shape elements 30 are used as the geometric shape and are located in a random manner along the top and bottom sides of the waveguide channel. Because the pin arrangement is random this 15 waveguide configuration achieves both the loss reduction provided by the simple waveguide of Figures 2(a) and (b) and the field response averaging advantage provided by the waveguide of Figures 3(a) -(e) as well as other advantages.
It is to be understood that the particular embodiments described herein, 2 o by way of illustration, are not intended to limit the scope of the invention claimed by the inventor which is defined by the appended claims.
Field of the Invention This invention relates to the design of microwave waveguides and, in s particular, to a waveguide incorporating geometrically-shaped elements and utilizing the associated primary (near) fields generated thereby to manipulate input microwave signals to satisfy specified performance requirements.
Background of the Invention Present waveguide design techniques rely on the fields generated by 1 o physical attributes such as complex internal contours and slot arrays but these physical attributes are difficult to control by reason of detrimental effects associated with manufacturing tolerances, operational variations, environmental changes and the target performance requirements. As a result, the present devices have associated with them undesirable performance losses and costs.
15 Summar)i of the Invention In accordance with the invention there is provided a waveguide configured for satisfying predetermined performance characteristics. A channel is provided by the waveguide and at least one geometrically-shaped element is positioned 2 o within the channel, the dimensions of the channel relative to the element determining the performance characteristics of the waveguide.
Brief Description of the Drawings Reference will now be made to the accompanying drawings which illustrate the present invention and in which like reference numerals refer to like 25 elements throughout.
Figures 1 (a) and 1 (b) illustrate a prior art waveguide, Figure 1 (a) being a perspective view thereof and Figure 1 (b) being a side cross-sectional view of the prior art waveguide of Figure 1 (a);
Figures 2(a) and 2(b) illustrate an exemplary waveguide in accordance with the present invention, Figure 2(a) being a perspective view thereof and Figure 2(b) being a side cross-sectional view of the waveguide of Figure 2(a);
Figures 3(a) - (e) illustrates another exemplary waveguide in accordance s with the present invention, Figure 3(a) showing a side cross-sectional view of the waveguide and Figures 3(b), (c), (d) and (e) showing front cross-sectional views taken at sections A-A, B-B, C-C and D-D, respectively; and, Figures 4(a) and 4(b) illustrates another exemplary waveguide in accordance with the present invention, Figure 4(a) being a fragmented io perspective view thereof (showing separated top and bottom halves one over the other) and Figure 4(b) being a side cross-sectional view of the waveguide of Figure 4(a) (but with the top and bottom halves joined together).
Detailed Description of the Illustrated Preferred Embodiment Figures 1 (a) and 1 (b) of the drawings show a conventional (prior art) 15 microwave waveguide in which the near (primary) field is determined according to a calculation based on the channel height n and length L of the waveguide.
For this conventional waveguide the nearfield extends overthe full length of the parallel sides 12 and 14 and this produces undesirable loss.
Figures 2(a) and 2(b) show a relatively simple waveguide in accordance 2 o with this invention in which a simple geometric bar-shape element 20 of uniform height h is incorporated into the waveguide channel at space intervals along the top and bottom sides of the waveguide channel and the field response is determined as a result of the primary field associated with the distance between two adjacent elements 20. A sufficient primary field must be produced 2 s in order to support the required, pre-determined microwave manipulation.
For this embodiment the primary field calculation is determined on the basis of the uninterrupted channel height n and the length L of the waveguide and the associated (secondary) field calculation is determined on the basis of the greatest (interrupted) channel height f, the length d of the bar element (geometric shape) 20 and the distance g between adjacent bar elements (geometric shapes) 20.
Figures 3(a)-(e) show a more complex waveguide in accordance with this invention in which a bar-shape element 40 is incorporated into the waveguide s channel at space intervals along the top and bottom sides of the waveguide channel and the height h of one set of these (being the upper elements in these figures) is varying across its width. This varies the near field and field response is determined as a result of an averaging of the primary field and associated fields whereby there is no longer any need that these elements be located 1 o precisely within the waveguide.
Figures 4(a) and 4(b) show a more complex waveguide in accordance with the invention in which a pin-shape elements 30 are used as the geometric shape and are located in a random manner along the top and bottom sides of the waveguide channel. Because the pin arrangement is random this 15 waveguide configuration achieves both the loss reduction provided by the simple waveguide of Figures 2(a) and (b) and the field response averaging advantage provided by the waveguide of Figures 3(a) -(e) as well as other advantages.
It is to be understood that the particular embodiments described herein, 2 o by way of illustration, are not intended to limit the scope of the invention claimed by the inventor which is defined by the appended claims.
Claims (4)
1. A waveguide configured for satisfying predetermined performance characteristics and comprising a channel wherein at least one geometrically-shaped element is positioned within said channel and the dimensions of said channel relative to said element determine said performance characteristics.
2. A waveguide according to claim 1 comprising a plurality of said elements positioned in spaced relationship along the length of said waveguide and having differing relative dimensions whereby the field response is determined on the basis of averaging.
3. A method for making a waveguide which satisfies predetermined performance characteristics, said method comprising providing a waveguide having a channel therein and positioning in said channel at least one geometrically-shaped element whereby the dimensions of said channel relative to said element determine said performance characteristics.
4
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002322334A CA2322334A1 (en) | 2000-10-02 | 2000-10-02 | Waveguide for microwave manipulation |
| US09/685,213 US6476696B1 (en) | 2000-10-02 | 2000-10-11 | Waveguide for microwave manipulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002322334A CA2322334A1 (en) | 2000-10-02 | 2000-10-02 | Waveguide for microwave manipulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2322334A1 true CA2322334A1 (en) | 2002-04-02 |
Family
ID=4167315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002322334A Abandoned CA2322334A1 (en) | 2000-10-02 | 2000-10-02 | Waveguide for microwave manipulation |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6476696B1 (en) |
| CA (1) | CA2322334A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7132909B2 (en) * | 2000-10-11 | 2006-11-07 | Paul Mack | Microwave waveguide |
| US6657520B2 (en) * | 2000-10-18 | 2003-12-02 | Dragonwave, Inc. | Waveguide filter |
| EP1479128A1 (en) * | 2001-11-27 | 2004-11-24 | Radiant Networks Plc | Waveguide and method of manufacture |
| FI20022257A (en) * | 2002-12-20 | 2004-06-21 | Elektrobit Oy | Method and arrangement for testing a radio device |
| US7023302B2 (en) * | 2004-01-14 | 2006-04-04 | Northrop Grumman Corporation | Slow-wave structure for ridge waveguide |
| US7606592B2 (en) * | 2005-09-19 | 2009-10-20 | Becker Charles D | Waveguide-based wireless distribution system and method of operation |
| EP3147994B1 (en) * | 2015-09-24 | 2019-04-03 | Gapwaves AB | Waveguides and transmission lines in gaps between parallel conducting surfaces |
| US11133594B2 (en) * | 2019-01-04 | 2021-09-28 | Veoneer Us, Inc. | System and method with multilayer laminated waveguide antenna |
| US11374321B2 (en) | 2019-09-24 | 2022-06-28 | Veoneer Us, Inc. | Integrated differential antenna with air gap for propagation of differential-mode radiation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772400A (en) * | 1954-01-08 | 1956-11-27 | Alan J Simmons | Microwave polarization changer |
| US3046503A (en) * | 1960-05-27 | 1962-07-24 | Seymour B Cohn | Broad-band waveguide filter |
-
2000
- 2000-10-02 CA CA002322334A patent/CA2322334A1/en not_active Abandoned
- 2000-10-11 US US09/685,213 patent/US6476696B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6476696B1 (en) | 2002-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |